kernel/linux.git/include/linux/iio, branch linux-4.3.y

iio: Add inverse unit conversion macros

2015-08-08T11:50:40+00:00

Add inverse unit conversion macro to convert from standard IIO units to units that might be used by some devices. Those are useful in combination with scale factors that are specified as IIO_VAL_FRACTIONAL. Typically the denominator for those specifications will contain the maximum raw value the sensor will generate and the numerator the value it maps to in a specific unit. Sometimes datasheets specify those in different units than the standard IIO units (e.g. degree/s instead of rad/s) and so we need to do a unit conversion. From a mathematical point of view it does not make a difference whether we apply the unit conversion to the numerator or the inverse unit conversion to the denominator since (x / y) / z = x / (y * z). But as the denominator is typically a larger value and we are rounding both the numerator and denominator to integer values using the later method gives us a better precision (E.g. the relative error is smaller if we round 8000.3 to 8000 rather than rounding 8.3 to 8). This is where in inverse unit conversion macros will be used. Marked for stable as used by some upcoming fixes. Signed-off-by: Lars-Peter Clausen Cc: Signed-off-by: Jonathan Cameron

iio: declare struct to fix warning

2015-08-08T11:28:46+00:00

When compile iio related driver the following warning shown: include/linux/iio/trigger.h:35:34: warning: 'struct iio_trigger' declared inside parameter list int (*set_trigger_state)(struct iio_trigger *trig, bool state); include/linux/iio/trigger.h:38:18: warning: 'struct iio_dev' declared inside parameter list struct iio_dev *indio_dev); 'struct iio_dev' and 'struct iio_trigger' was used before declaration, forward declaration for these structs to fix warning. Signed-off-by: Pengyu Ma Acked-by: Daniel Baluta Signed-off-by: Jonathan Cameron

include: linux: iio: Add missing kernel doc field

2015-08-02T17:36:05+00:00

Fix kernel doc for the iio_dev_attr structure by adding its missing field. Signed-off-by: Cristina Opriceana Signed-off-by: Jonathan Cameron

include: linux: iio: Fix function parameter name in kernel doc

2015-08-02T17:34:18+00:00

Fix buffer name from kernel doc according to the function parameter. Signed-off-by: Cristina Opriceana Signed-off-by: Jonathan Cameron

iio: st-sensors: add configuration for WhoAmI address

2015-07-23T19:43:04+00:00

This patch permits to configure the WhoAmI register address because some device could have not a standard address for this register. Signed-off-by: Giuseppe Barba Reviewed-by: Denis Ciocca Acked-by: Denis Ciocca Signed-off-by: Jonathan Cameron

iio: Fix parameters in iio_triggered_buffer_setup

2015-07-05T14:19:50+00:00

This patch renames the top half handler and the bottom half handler of iio_triggered_buffer_setup() in accordance with their usage. The bottom half has been renamed to reflect the fact that it is a thread based call, compliant with iio_alloc_pollfunc(). The names of the parameters were swapped, thus creating confusion. Signed-off-by: Cristina Opriceana Signed-off-by: Jonathan Cameron

iio: Specify supported modes for buffers

2015-06-01T10:31:12+00:00

For each buffer type specify the supported device modes for this buffer. This allows us for devices which support multiple different operating modes to pick the correct operating mode based on the modes supported by the attached buffers. It also prevents that buffers with conflicting modes are attached to a device at the same time or that a buffer with a non-supported mode is attached to a device (e.g. in-kernel callback buffer to a device only supporting hardware mode). Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron

iio: core: add high pass filter attributes

2015-05-17T09:32:35+00:00

Add a high pass filter attribute for measurements (like the existing low pass) Also add both high and low pass attributes for events. Signed-off-by: Martin Fuzzey Signed-off-by: Jonathan Cameron

iio: core: Introduce IIO_CHAN_INFO_OVERSAMPLING_RATIO

2015-05-10T19:31:44+00:00

Some magnetometers can perform a number of repetitions in HW for each measurement to increase accuracy. One example is Bosch BMC150: http://ae-bst.resource.bosch.com/media/products/dokumente/bmc150/BST-BMC150-DS000-04.pdf. Introduce an interface to set the oversampling ratio for these devices. Signed-off-by: Irina Tirdea Signed-off-by: Jonathan Cameron

iio: core: Introduce IIO_CHAN_INFO_CALIBEMISSIVITY

2015-04-09T14:03:05+00:00

Contact-less IR temperature sensors measure the temperature of an object by using its thermal radiation. Surfaces with different emissivity ratios emit different amounts of energy at the same temperature. IIO_CHAN_INFO_CALIBEMISSIVITY allows the user to inform the sensor of the emissivity of the object in front of it, in order to effectively measure its temperature. A device providing such setting is Melexis's MLX90614: http://melexis.com/Assets/IR-sensor-thermometer-MLX90614-Datasheet-5152.aspx. Signed-off-by: Vianney le Clément de Saint-Marcq Cc: Arnout Vandecappelle (Essensium/Mind) Signed-off-by: Jonathan Cameron